All Rights reserved
At a ground zero memorial service on Saturday, Vice President Joe Biden joined New York mayor Michael Bloomberg and thousands of people who lost loved ones during the September 11 attacks nine years ago.
President Barack Obama attended a memorial at the Pentagon with Defense secretary Robert Gates.
"No other place is as filled with our compassion, our love, and our solidarity," Bloomberg said. "It is with the strength of these emotions as well as the concrete, glass, and steel that is brought in day by day that we will build on the footprints of the past the foundation of the future."
As has become tradition on the anniversary of the 9/11 attacks, the names of all 2,752 people who lost their lives at the World Trade Center were read aloud.
In a field near Shanksville, Pa., where United Flight 93 crashed, first lady Michelle Obama and former first lady Laura Bush attended a memorial for the 40 who died there, the Pittsburgh Post-Gazette reports.